[Python-ideas] math.inf and math.nan constants
Mark Lawrence
breamoreboy at yahoo.co.uk
Mon Jan 12 17:44:29 CET 2015
On 12/01/2015 16:05, Stephen J. Turnbull wrote:
> Chris Barker - NOAA Federal writes:
>
> > > But it's not a singleton, not even in the class of NaNs. It's a named
> > > constant, like zero or pi.
> >
> > Right, it's a particular value of a float -- more that that, it's a
> > bunch if values, so even less a singleton than pi, even.
>
> AFAIK, the proposed math.nan is *not* a bunch of values. It's a
> particular float value that happens to be a NaN, just as math.pi is a
> particular float value that happens not to be a NaN.
>
The implementation is here
https://hg.python.org/cpython/rev/cf4bf577749c so as "Although
practicality beats purity." can we move on now please?
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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